Calculator



E. C. WALTER;

CALCULATOR.

APPLICATION man on. a. 19m.

Patented Dec.'14, 1920.

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CALCULATOR,

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CALCULATOR.

APPLICATION FILED Me. 8. 1916.

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CALCULATOR.

APPLICATION FILED DEC. 8. 1916.

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UNITED STATES PATENT OFFICE.

EDWARD c. WALTER, OF NEW YORK, 1v. Y., ASSIGNOR T0 EAR-RY r. AMBROSE, 0F

. ORANGE, NEW JERSEY.

CALCULATOR.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Application filed December 8, 1916. No. 135,827.

To all whom it may concern:

Be it known that I, EDWARD C. WALTER, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Calculators, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates primarily to calculators and has reference more particularly to calculating machines for typewriters.

One of its'objects is to provide mechanism that will, when items are written by the typewriter, simultaneously effect an actuation of a plurality of selec'ting-mecha-' nisms in the calculating machine, after which these items are transferredto denominational members in the machine.

Another object is to provide in a single machine a general selecting-mechanism combined with'a plurality of sets of secondary selecting-mechanisms so connected to the general selecting-mechanism that operation of one of the secondary selecting-mechanisms will also effect operation of the general selecting-mechanism without operation of the other secondary selecting-mechanism. Another object is to provide means in such my invention are to provide for flexibility of operations in connection with adding, subtracting, zero-produclng, elimination of wrong selection without operation of the denominational members or figure-rolls, etc.

and, for these purposes, to incorporate mechanism which is simple in constructiompositive in action, and easy of operation; since all of these are of prime importance for producing a commercially perfect and practical machine of the type 'knownas the bookkeeping machine wherein debits,

credits, net-sales, old and new balances, etc., are recorded by the-typewriter and coop eratively computed by the calculating machine attached thereto.

Other objects and advantages of the invention will be more or lessapparent, while further objects and advantages will be made to appear in the following description and in the appended drawings.

in order that the invention may be more readily comprehended, I have exhibited two embodiments of the same in the accompanying drawings which are, however, merelv illustrative and constitute an exemplification of a practical structure; and in these- Figure 1 is a view in side elevation of a calculating machine in which my invention is incorporated and shows, in general, the side of the machine on which the actuating handle is mounted and the relative position of the connecting shafts for the different selecting-mechanisms; also, the adding and subtracting shift-lever, the zero-producing lever, etc;

Fig. 2 is a view in vertical section of the calculating machine and (in fragmentary form) of the carriage on which the masteractuator is mounted;

Fig. is a view in perspective and somewhat diagrammatic, and shows the connection between similar units of a plurality of selecting-mechanisms Fig. 4 is a detached view, in side elevation, of one of the selecting-mechanism-units forming a part of the general register, and shows the locking-lever thereof and its latch in inactive position; I

Fig. 5.is a similar View and showsthe iocking lever and its latch in active posiion;

Figs. 6, 7, 8 and 9 are views in detail of unassembled parts of the structure;

Fig. 10 is a view in horizontal section of the lower part of a plurality of the registers and shows the connections between the various selectingmechanis'ms thereof;

I Fig. 11 is a fragmentary view in perspective, similar to Fig. 3, of a second set of the components of the selecting-mechanism, the connecting shafts thereof in this instance being disposed below the plane of the actuating plungers; and

Fig. 12 is a fragmentary view in side elevation of a modif ed form .of construction.

The presentin'vention contemplates the employment of the structure of'a calculat.

ing attachment similar'to that disclosed in United States Letters-Patent No. l,224t,872, granted May "1, 1917, and certain details of which also appear in my pending application filed September 11, 1916, Serial No. 119,500, and also in my United States Patent No. 963,927, granted July 5, 1910:

The machine as revealed in my said Patent 1,224,872 includes a .series of typewriter-keysone of which therein appears and is marked 1mounted (in this instance) on a carriage C which is moved in relation to the calculating-machine CM. Adapted to be operated by the key 1, through connecting actuating-instrumentalities, is a master-actuator 2 which is also mounted on and carried by the carriage C. This actuator, when the key is depressed, is made active to operate certain parts presently to be described and thereby set up a condition on selecting-mechanism constituting one of the primary components of the calculating-machine, and from which the items set up on said selecting-mechanism are transferred to denominational-members or rolls In other words, the effect of the operation of, first, the key 1, then of the actuator 2, and then of the selecting-mechanism is to produce an actuation of said selecting-mechanism equal in units to the value of the denomination represented by the depressed key,- whereupon an actuating mechanism (presently again to be referred to), such as a pull-handle or motor, is operated to cause the computing-mechanism to be brought into coeperative connection with the selecting-mechanism, this being accomplished while the selecting-mechanism is being returned to normal position. This action will cause the computing-mechanism to be operated to the extent of the return movement of the selecting-mechanism, after which the selectingmechanism is disconnected from the computing-mechanism. The computing-mechanism is disconnected from the selecting-mechanism, as

just referred to, before operation of the carrying-mechanism which also forms a component of the machine. Tn this instance, however, the computing mechanism is re tained in connection with the selectingmechanism until after the carrying operation is complete; and this involves a certain change of operatiomin the machine of the present embodiment, from that produced in the machine of my aforementioned patents and application. f'

The machine, as herein disclosed-dike the machine of'my said PatentNo. 1,22e,872 includesthe typewriter-key 1--,--supported in the carriage .adaptedttolco ntrol the operation of the Inastemactu'atorjfZ; The :actuator, by mean-sot a device presently to be explained, actuates and controls the exincense tent of movement of a selector-segment 3, constituting a component of the selecting mechanism, and disposed in cooperative connection with a main gear 4 through a shiftable gear-carrying plate 5. This plate carries a pair of gears 6, and a single gear 6". According to the position of the plate 5, the gears 6 or the gear 6 will be in mesh with the main gear 4:- When the carryingmechanismrepresented in this instance by the numeral 7 and which is more fully described in my aforementioned application, Serial No. 119,500is being operated, the segment 3 will (by mechanism presently to be described) be moved one unit-space beyond its normal position and will then abut against a stop-element 8 which, in turn, will operate to restore the segment 3 to its normal position after it shall have been machine which includes a general register and also a plurality of secondary registers, each of which is cooperatively connected to the general register in such manner that operation of the selecting-mechanism of one of the plurality of secondary registers will also efiect a similar operation of the selecting-mechanism of the general register: In l ig. 10, there are represented, at the left of the sheet, two of the secondary registers; on the extreme right is a general register; and between the secondary and general registers' is a selecting-mechanism unconnected to any computing-mechanism.

The aforementioned operation of one register by another is accomplished in the following manner: A unit-plunger 9 for each secondary register is disposed in engagement with a mutilated gear 10 mounted on a shaft 11. This shaft carries a gear 12 which meshes with the rack-portion of a unit-plunger 13 of the general register. Similarly, the corresponding tens-plungers are connected in series to the tens, plungers of the general register; and so on for the hundreds, thousands, tenthousands, etc. For the sake of compactness, some of the shafts and gears are dis posed above the plungers, as appears in Figs. 2 and 3, while others are disposed below the plane of such plungers, as shown in the plunger will turn the gear 10 and cause rotation of its shaft 11 and, thereby, of the' 13. The gears 10 and plungers 9 for all the registersexcept those for the general register when in normal pos1t1on--are normally unconnected except where the pro ection 14;

. engages the shoulder 15. This arrangement operation of the pull-handle, then, thispermits normal rotation of the shafts 11 by movement of the plungers 13 of the general register without disturbing the plungers 9 of the secondary registers; and, likewise, movement of the shafts 11 can be effected by action of'theplungers 9 of one of the secondary registers without disturbing the plungers 9 of the other secondary register, though the plungers 13 of the general register would, in this instance, be operated.

It will be clear, therefore, that if a selectionreprcsented in. the numerals 185, for

instance-is made on the first secondary' register, the action of its plungers 9 on the connecting shafts 11 and gears 10 and 12 will be to produce a similar selective condition on the general register. Then, by operation of a pull-handle 16 (Fig. 1) the selections will be transmitted to and retained by both registers, and the plungers 9 and 13 will be returned to normal position. Now, if a selection of, say 155 is similarly made on the second register of the series, it follows that a similar selection will be made on the general register; and, by

amount is transferred'and retained in the second of the secondary reglsters and is then transmitted and added to the first register, is provided with a stop 18 adapted to engage an abutment 18 at the rear of the structure.- This will prevent the plungers from being mox'ed beyond their normal shiftable POSltiOILz The plunger 13comprises, in this instance, two members, the rear poition being marked 13, as already specified, and the forward portion being marked19. The forward member 19 is connected to the rear member '13 by means of headed pins or rivets carried by the member 19 and extending through slots 21 in the member 13, this arrangement. permitting relative motion between the two members except when locked together by instrumentalities presently to be described. This two--membered plunger 13, 19 is adapted to be engaged by the master-actuator 2 and thereby be thrust rearwardly, and 'by which the gears 12 and the shafts 11 are ro tated in a counterclockwise direction. As the forward end of the member 19 is connected to the selector-segment 3, movement of the two-membered plunger will actuate the segment not only to an extent corresponding to the denomination of the typewriter-key which has been depressed to operate the master-actuator 2 but one additional unitspace when a carrying operation is taking place. lVhen such operation occurs, means are provided whereby the two members 13 and 19 are locked together while a selection is being made thereon, but these are normally unlocked and the forward member 19 is capable of a slight movementequa1 to one unit-space--independently of the member 13 when the carrying operation is taking place. The segment 3 will cause the forward member 19 to be moved this extra unit-space during the carrying operation, and the stop 8 will actuate and return the segment and the forward member to normal position after the carrying operation shall have been completed. This action takes place only on the plungers 13 of the general register, since the shoulders 15 of the plungers 9 may disengage from and .rcengage with the projections 14 on the gears 10 without effecting movement either of these gears 10 or of the gears 12 and the shafts 11 therefor. It will, of course, be understood that the actuator 2 is adapted to engage the forward ends of the plungers 9 to rotate the gears 10 and shaft 11, and whereby the gears 12 and plungers 13 are similarly actuated.

The means for locking the members 13 and 19 together include a locking-lever 22 mounted on the member 19 and which, when raised, will position a lug 22 thereon into shaft is a gear 24 with which meshes an intermediate gear 25. lVith this meshes a gear 25 which, in turn, meshes with a gear 26 which, through the shaft 23 and gears 24, 25 and 25, will also be given a complete revolution each time that the pull-handle is therein until another selection is made.

actuated. Attached to the gear 26 is a camclement 2'7 provided with a circumferential projection 28. Disposed below the locking lever 22, and adapted to tilt the same upwardly is a plate 29 provided with a flange 30 upon which the several locking levers 22 rest. The plate 29 is fulcrumed on a shaft 31 which carries an arm 32 adapted to engage with the periphery of the cam-element 27. A spring 29 is adapted to hold the arm 32 against the cam-element. In consequence, when the handle16 is operated, the cam-element will make one complete revolution and, when the arm 32 rides off the projection 28, the plate 29 will be permitted to descend and alloW the locking-levers 22, under the action of springs 33, to drop, and, then, to raise the plate 29 and latches 22 after the carrying operation has been completed. This carrying operation, as aforementioned, causes the forward member 19 of the two-membered plungers to be moved one space beyond the normal position and then be returned by the temporary stop 8 to normal position.

'1? he rear members 13 of the two-membered plungers are provided with latches 34 which are adapted to rest against and be held in a raised position by the locking-levers 22. Springs 35 which engage the latches 34 will cause them to, be lowered when the lockinglevers 22 aredropped. The latches 3% project through a supporting comb 36 and are provided with shoulders 34: adapted to hook over the comb, this construction and arrangement preventing movement of the rear member of the two-membered plungers when the latches 22 are in their lowered position, and this permits the member 19 to be moved in either direction without disturbing the rear member of the two-membered plunger.

.A modified form of structure (as shown in Fig. 12) contemplates the omission of the projection 19 on the member 19 and of the spring 33, and the inclusion of a transverse bar 37. This bar is so disposed as normally to be clear of the ends of the locking-levers 22 when they are in their normal position; but such levers (when the member 19 is shifted rearwardly) are moved rearwardly and over the bar 37 when a selection is being made so that the bar will then hold the locking-levers 22 in locked position until they are returned to normal position where the latches 34 will cause these levers to be lowered and the plate 29 will again tilt the levers to locking position and hold tl ilem he function of the bar 37 is to prevent the locking-levers 22 from droppingwhen the lifting-plate 29 is lowered-until after the plungers shall have been returned to normal position. This insures the proper return of the rear members of the two-membered plungers to normal position.

Obviously, registers which contain.

SIX

units will be provided with six connecting shafts; while a register which is composed of nine units will have a corresponding number of connecting shafts, etc.

From the foregoing, it will be perceived that I have succeeded in devising a structure which is well adapted to achieve the several objects and ends in view. It is quite simple and compact in form, and the parts of which it is formed are readily manufactured and assembled.

As many changes can be made in the above construction and many widely different embodiments of the invention can be made without departing from the spirit thereof, it is intended that all matter contained in the foregoing description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim is:

1. In combination with a typewriter ineluding keys and a carriage movable stepby-step by the action of the keys, a plurality of computers, each provided with selecting means and severally operated to effect a se lection by the action of the keys, and nor mally independent means comprising a series of mutilated gears and a full gear all secured together for connecting and disconnecting the corresponding components of each selecting means to effect a sumultaneous selection on two of the computers when the selecting means of one of the computers is operated by the keys and merely a selection on one of the computers when the selecting means of another of the computers is operated by the keys.

2. A. typewrlter including keys and a carriage moved step-by-step by the operation of said keys, a plurality of relatively stationary computers, each provided with selecting mechanisms severally operated by the keys to efiectYa selection, and normally inactive means comprising mutilated and full gears for connecting and disconnecting corre sponding components of the selecting mechanisms of the computers when the selecting mechanism of one of the computers is operated and, thus, efl'ecting a selection on a plurality of the selecting mechanisms, such.

, selection on the selecting mechanism on one of the computers when a selecting mechanism of another of the computers is operated by the plunger, and means for returning the selecting mechanisms to normal position and effecting a disconnection of the selectin mechanisms.

4. combination with a plurality of computers, selecting mechanisms therefor, means comprising a series of gears normally disconnected from and operable independently of some of the selecting mechanisms for connecting the selecting mechanism of cer' tain of the computers and without operating a with the racks, when the projections are the selecting mechanisms of other of the computers and operating automatically to connect a plurality of the selecting mechanisms of the computers for simultaneous operation thereof when the selecting mechanism of another of the computers is operated.

5. A' typewriter including operating keys, a carriage actuated in a step-by-step manner by the operation of the keys, a single reciprocating master means mounted on the carriage and having a differential movement under the action of the keys, a plurality of computers juxtaposed to the carriage and each including a series of selecting devices actuatable to variable extents by the operation of the master means to effect merely a selection, means comprising a series of mutilated and full-toothed members juxtaposed to the respective selecting devices and normally independent of all but one of the devices, said means being operable to effect simultaneous operation of the selecting devices of two of the computers when any but one of such devices is operated, only one of the selecting devices being operated when said excepted device is operated, and separate means for returning all of the devices to normal position, said returning operation effecting a single or a double computation in the computers according to the selections made and, also, simultaneously disconnecting the connected selecting devices if a plurality selection has been made.

6. A computing structure including a plurality of computing devices, a series of selecting mechanisms in the computing devices, an independent series of selecting mechanisms, all'of the selecting devices being normally unconnected one from the other, means comprising a series of mu.- tilated and full-toothed members adjacent the respective selecting devices for connecting the corresponding components theretypewriter including a carriage, in-

of to effect simultaneous operation of the same when one of the devices is operated and permitting operation of a single device when other of the devices are operated, and means for returning the se lecting devices to normal position and effeet a computation in the computers and simultaneously disconnect any of the selecting devices which had been connected in the operation of making a selection.

In a computingstructure, a series of key-operated rack-bars, some of the bars being provided with an incut at the rack provided end thereof, a shaft extending transversely of the bars and provided with toothed members, projections formed on some of the toothed members and normally abutting against the bars at the incut portion, the other toothed members being in mesh with the rack portion, the teeth of the toothed members being out of engagement abutting against the incut portions of the racks of the other bars.

8. A computing machine including a series of selecting devices,,a portion of each of the selecting devices comprising a plurality of separably movable bars, a latch for joining the bars to prevent independent movement thereof, keys for moving the bars simultaneously in one direction, and means for actuating the bars in the opposite direction during a part of their movement and actuatable to releasethelatch andtherebypermit independent movement of the bars during a continued movement thereof.

9. In a computing machine, selecting mechanisms, a part of which comprises a two-membered rack bar, the members thereof being slidably connected together, one of the members being provided with a notch, and a latch on the other member adapted to enter the notch to prevent relative movement of the members, a spring for each latch to move it out of the notch, a lifting plate common to the latches of the selecting mechanisms and actuatable to move the latches into the notches, and actuating means for operating the lifting plate.

10. A computing machine including a plurality of unit-transfer mechanisms, a general transfer mechanism, normally unconnected means automatically operated by actu'ation'of the unit-transfer mechanisms to connect any of the plurality of the transfer mechanisms to the general transfer mechanism and thereby cause simultaneous operation of such general transfer mechanism, the normally unconnected means remaining inoperative when the general transfer mecli- F anism is operated,

11. In combination, computer, a typewriter for operating the same, a series of secondary registers, a general register associated therewith, a series of shafts therein,

gears on the shafts meshing with the general register, mutilated gears also on the shafts and normally out of mesh with the secondary registers, and automatically operated means for causing the mutilated gears to mesh with the secondary registers when operated by the typewriter.

12. The combination with a typewriter comprising keys, of a seriesof secondary registers, a general register, a series of mechanisms for each register and movable variable distances by the keys, a shaft provided for each set of corresponding mechanisms of the registers, a mutilated gear for each corresponding mechanism of the series of registers, and a complete gear for the corresponding mechanism of the general register. 13. The combination with typewriterkeys, of a series of secondary registers and a general register associated therewith, a lever for each register movable variable distances by the typewriter-keys, gear-teeth and a shoulder on each lever of the series, gearteeth on the levers of the general register, a shaft for each set of corresponding mechanisms of all of the registers, a gear provided with a projection mounted on the shaft for each of the corresponding mechanisms of the series of registers, the projection resting against the shoulder of the levers and operable to initiate movement of the shaft when the levers are moved, and a gear mounted on the shaft and constantly in mesh with the lever of the general register.

14. The combination with a computing typewriter having keys, of a series of secondary registers and a general register associated therewith, a series of selecting mechanisms for each register and settable by the keys to effect a selective-action, a series of shafts associated therewith, and a complete gear and a series of mutilated gears on the shafts for transmitting motion from corresponding units of the selecting mechanisms of the series of registers to those of the general register whereby a simultaneous selection will be made by action of the typewriterkeys on any one of the registers of the series and on the general register.

15. The combination with a computing typewriter including keys, of a plurality of series of plungers movable variable distances by the keys, each plunger being provided with gear-teeth and a shoulder, shafts extending across the plunger-s and provided with mutilated gears against which the shoulders of the plungers abut and with which the teeth of the same mesh, a general register comprising a series of two-membered plungers, one member of which is provided with gearteeth, gears on the shafts for meshing with the gear-teeth, locks on the plungers for'locking the two members of each plunger together, and means for operating the locks.

16. The combination With a computingvtypewriter including keys, of a series of selecting-mechanisms associated therewith, one of said series being of a construction different from the others and one part of the same having movement at certain periods independently of its conjoined parts, and means for locking the conjoined parts together.

17. The combination with a typewriter, of a series of calculating-machines each including selecting-mechanisms normally unconnected one with the other and actuatable by the typewriter, means for operating certain of the selecting-mechanisms while the type-- writer is rendering active other of the selecting-mechanisms and while certain of the selecting-mechanisms are inactive.

18. The combination with a typewriter, of a series of calculating-machines operable thereby independently or in series and each including selecting-mechanisms normally unconnected one with the other, and means for connecting a series of the selecting-mechanisms and effecting their operation while the typewriter is operating certain of the calculating-machines; the connecting and operating means being inactive as to certain of the selecting-mechanisms when the typewriter is operating other of the calculatingmachines either independently or in series.

19. The combination of a typewriter and the printing-keys therefor, of a calculating machine including a plurality of registers associated therewith, a selecting-mechanism for each register operable by the printingkeys to effect a selection, and means for effecting a simultaneous movement of a plurality of the selecting mechanisms independently of the operation of the registers for effecting a computation; said means comprising a series of mutilated gears for all but one of the selecting-mechanisms one of the selecting-mechanisms being provided with a series of full-toothed gears, the mutilated gears being normally out of mesh wit-h their respective selecting-mechanisms and the full-toothed gears being normally 111 mesh with their respective selectingmechanisms.

20. The combination with a typewritcr, the printing-keys thereof, and a masteractuating means operated thereby, of a plurality of registers cooperatively associated with the typewriter, means associated with each register and adapted to be successively operated by the master-actuating means, and means for simultaneously operating a plurality of the said successively-operated means when operated by said master-actuating means; said means comprising a series of mutilated gears for all but one of the selecting-mechanisms, one of the selecting- Inechanisms being provided with a series of full-toothed gears, the mutilated gears being normally out of mesh with their reany one of th spective selecting-mechanisms and the fulltoothed gears being normally in mesh with their respective selecting-mechanisms.

21. The combination with a typewriteroperated computing-machine, of a typewriter including keys, a series of registers, denominational selectors associated therewith and settable by the typewriter-keys prior to the actuation of the registers for effecting a computation, and means for simultaneously actuating a pluralityof'the key-set selectors; said means comprising a series of mutilated gears for all'but one of the denominational selectors, this denominational selector being provided with a full-toothed gear, the mutilated and full toothed gears for like denominational selectors being fastened together.

22. In combination in a computingmachine, of a plurality of unit-transfer mechanisms and a eneral-transfer mechanism,

5 plurality being operable to cause simultaneous operation of the generaltransfer mechanism independent of operation of other of the transfer mechanisms; each of the unit-transfer mechanisms being associated, but normally out of mesh, with a toothed element and the general-transfer mechanism being associated but normally in mesh, with a toothed element.

23. The combination with a typewriter having keys, of a plurality of computingheads associated therewith, a set of denominational devices therein movable variable distances by action of the typewriter-keys thereon, a general computing-head, a set of denominational devices therein and also movable variable distances by action of the typewriter-keys thereon, and means connecting corresponding denominational devices of each set and the general computer set whereby movement of any of the denominational devices will cause simultaneous movement of the corresponding device in the general set, and movement of the general set may be accomplished by action of the typewriter-keys without movement of the other sets.

24. In combination, a typewriter having keys, a computing-machine including a series of secondary registers and a general register, a series of selecting-mechanisms for each register movable variable distances by the keys of the typewriter, a series of tens-carrying mechanisms for the registers, a shaft for each set of corresponding selecting mechanisms, a mutilated gear on the shaft for each corresponding selecting-mechanism, and a complete gear on the shaft for the corresponding mechanism of the general register, said mutilated and complete gears operating to effect a simultaneous operation of a plurality of selecting-mechanisms when any of the series of secondary registers 1s operated and permitting operation of the general register without operation of the secondary registers, and means for causing the'tenscarrying mechanism to move the selectingmechanisms one unit-space beyond normal position independently of the movement of the shafts.

The combination with a typewriter, of a computing-machine acting under the influence of the typewriter and including an actuating-lever and a plurality of series of selecting-mechanisms, a series of shafts normally unconnected with the selecting-mechanisms, means for connecting the shafts to the selecting-mechanisms to effect. conjoint operation thereof in one direction by operation of the typewriter vand in the opposite direction to normal unconnected position by operation of the actuating-lever.

26. The combination with a typewriter, of a computing-machine acting under the influence of the typewriter and including an actuating-lever and means operated thereby for effecting computations, a plurality of series of selecting-mechanisms normally unconnected one from the other, means oper ated by the typewriter for connecting the selecting-mechanisms, and means operated. by action of the actuating-lever to effect movement of the selecting-mechanisms to.

produce a plurality of computations and also to effect disconnection of conjoint selecting-mechanisms, whereby the same may then have independent movement.

27. T he combination with a typewriter, of a computing-machine including an actuating-lever and means operated thereby for effecting computations, a plurality of series of selectmg-mechanisms normally unconnected one from the other, means operated by the typewriter for connecting the selecting-mechanisms, means operated by action of the actuating-lever to effect movement of the selecting-mechanisms to produce a plurality of computations and also to effect disconnection of conjoint selecting-mechanisms,

whereby the same may have independent movement, and means operated by the actuating-lever for effecting independent movementof the selecting-mechanisms.

28. The combination with a typewriteroperated computing-machine, of a plurality of series of independently operable select having keys, of a computing-machine in cluding a plurality of series of selectingmechanisms movable in one direction by operation of the typewriter keys to effect a selection only, normally unconnected means juxtaposed to the selecting-mechanisms for connecting and operating a plurality of the same when some of them are operated by the keys and continuing unconnected even when other of the selecting-mechanisms are operated, means for moving said selectingmechanisms in the opposite direction to effect either a single computation or a plurality of computations and to efiect disconnection of connected selecting-mechanisms and thereafter to permit independent movement of the selecting-mechanisms, and means for effecting such independent movement of the mechanisms.

30. The combination with a typewriter, of a computing-machine including actuatingmeans, a plurality of series of selectingmechanisms comprising components of relatively difi'erent construction, means normally unconnected for connecting the selectingmechanisms in pairs for conjoint movement under predetermined conditions of manipulation and also independent operation under other conditions of manipulation, means operated bythe actuating means for returning the selecting-mechanisms to normal unconnected position, and means for effecting independent action of the selecting-mechanisms.

31. The combination with a typewriter, of a computing-machine including actuatinginstrumentalities, selecting-mechanisms operable by the typewriter to effect a selection, and comprising two-part plungers, a lock carried b one part of the plunger for connecting t e two parts together, spring-actuated levers connected to the other part for efiecting disconnection of the lock and for holding one of the plunger-parts from movement when released, and means operable by action of the actuating-instrumentalities for rendering the lock active to lock the plungers together.

32. The combination with a typewriter having keys, of a computing-machine including actuating-instrumentalities, and selecting-mechanisms settable by operation of the type-writer keys to efi'ect a selection and also a connection of a plurality of the selectQ ing-mechanisms and operable by operation of the actuatingrinstrumentalities to effect computations and a disconnection of the selecting-mechanisms;

33. The combination with a ty ewriter having keys, of a computing mac ine including"- actuating-instrumentalities, selectin -mechanisms settable by operation of the 'typewriterrkeys to efiect aselection and also a connection of-a plurality of'the selectingneeaeso mechanisms by the' tens-carrying ,mecha nisms, and means for restoring said parts to normal position.

35. The combination with a typewriter, of a computing-machine comprising a plurality of series of selecting-mechanisms, shafts extending across, above and below the selecting-mechanisms, full-toothed and mutilated gears on the shafts for connecting the selecting-mechanisms for conjoint movement, the mechanisms also having independent movement thereof, and means for moving the selecting-mechanisms to normal position and thereafter permitting their independent movement.

36. The combination with a typewriter, of a computing-machine comprising a selecting-mechanism consisting of a plunger i11- volving two members slidably held together, a spring-actuated latch for holding one member of said plunger stationary, a locklatch attached to the other member of the plungerv for locking the two members together and for releasing the same, and means for controlling movement of the lock-latch.

37. The combination with a typewriter provided with keys, a plunger movable variable distances thereby, a latch on the plunger, and means operated by the keys to lift the latch, of a computing-machine including a plurality of series of selecting-mechanisms operable by the plunger through the medium of the keys, means normally unconnected but operable by action of the plunger to connect a plurality of selectingmechanisms whereby the same may have conjoint movement, said latch operating to connect the selecting-mechanisms with the plunger when operated by the keys to prevent the selecting mechanismsfrom shitting away from the plunger and having movement a lock-latch on the other element of the rality of elements, serrated racks for slidably retaining the elements, stops on one plunger for locking the two elements together, and means for locking and releasing the lock-latch and for moving the spring- 10 actuated latch. In testimony whereof I afiix my signature 1n presence of two witnesses.

' EDWARD C. WALTER.

Witnesses:

GEO. W. DOWNING,

ADOLPHE BOURGUIGNON. 

